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Preparation method of quick-dry tung oil woodwork varnish

A technology of wood varnish and tung oil, applied in the direction of dry oil paint, coating, etc., can solve the problems of slow drying speed, poor decorative effect, poor paint film performance, etc., achieve fast drying speed, no shrinkage cavity, and overcome dryness slow effect

Active Publication Date: 2019-03-22
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, especially the problems of slow drying speed, poor paint film performance after drying, and poor decorative effect in the application process of tung oil paint, and provide a kind of fast-drying tung oil woodware The preparation method of varnish

Method used

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  • Preparation method of quick-dry tung oil woodwork varnish

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reference example 1

[0016] In each embodiment, the preparation method of tung oil fatty acid methyl ester thinner comprises the following steps:

[0017] (1) Preparation of tung oil fatty acid methyl ester: Preheat tung oil at 65°C for 30 minutes, add methanol equivalent to 40% of the mass of tung oil and KOH equivalent to 1.1% of the mass of tung oil, heat, stir and reflux at 70°C for 1 hour, then cool , move the reaction product to a separatory funnel, let stand to separate layers, take the upper layer, and rotate to evaporate to obtain tung oil fatty acid methyl ester;

[0018] (2) Preparation of unsaturated fatty acid methyl ester: Weigh urea and ethanol according to the mass volume ratio of 1:5g / mL, mix them, heat and stir at 65°C and reflux, after the urea is completely dissolved, add the urea-ethanol mixture to the preheated In the tung oil fatty acid methyl ester obtained in step (1) at 65°C, the ratio of the mass of tung oil fatty acid methyl ester, the mass of urea to the volume of etha...

Embodiment 1

[0020] The preparation method of the fast-drying tung oil wood varnish of the present embodiment may further comprise the steps:

[0021] (1) Weigh 100 parts by weight of tung oil raw material, stir in a constant temperature water bath at 100°C for 1.5 hours, remove the moisture in the tung oil, then cool down to 70°C, add 3.5 parts by weight of activated clay, continue stirring and reacting for 35 minutes, after the reaction, cool , suction filtration to obtain decolorized tung oil;

[0022] (2) Take 100 parts of decolorized tung oil obtained in step (1), heat it in a water bath to 75°C, add 6 parts by weight of KOH solution with a mass fraction of 12% under stirring, continue to stir and react for 30 minutes, and stand for 4 hours after the reaction to obtain oil Soap mixture: put the oil-soap mixture in a high-speed centrifuge, centrifuge at a controlled speed of 3000r / min for 15min, take the upper layer of oily liquid, heat it to 85°C, add 12 parts of 95°C distilled water ...

Embodiment 2

[0025] The preparation method of the fast-drying tung oil wood varnish of the present embodiment comprises the following steps

[0026] (1) Weigh 100 parts of tung oil raw materials, stir in a constant temperature water bath at 100°C for 1.5h, remove the moisture in the tung oil, then cool down to 70°C, add 3.5 parts by weight of activated clay, continue to stir and react for 35min, after the reaction is over, cool, Suction filtration can obtain decolorized tung oil;

[0027] (2) Take 100 parts of the decolorized tung oil obtained in step (1), heat it in a water bath to 75°C, add 6 parts by weight of KOH solution with a mass fraction of 12% under stirring, continue to stir and react for 30 minutes, and let it stand for 4 hours after the reaction is completed to obtain Oil-soap mixture: put the oil-soap mixture in a high-speed centrifuge, centrifuge at a controlled speed of 3000r / min for 15 minutes, take the upper oily liquid and heat it to 85°C, add 12 parts of 95°C distilled ...

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Abstract

The invention relates to a preparation method of a quick-dry tung oil woodwork varnish. The preparation method comprises the following steps of (1) discoloring the raw material of crude tung oil; (2)preparing the refined tung oil; (3) selecting the refined tung oil, heating while stirring, reacting, cooling, adding a tung oil fatty acid methyl ester thinner, the refined tung oil and styrene, anduniformly mixing; adding an initiator, maintaining the temperature for 60 to 80 DEG C, continuing to react for 0.5 to 1 h, finishing the reaction, cooling, adding a leveling agent and an organic silicone defoaming agent, and dispersing by a high-speed dispersing grinding machine until the fineness is lower than 50 micrometers, so as to obtain the quick-dry tung oil woodwork varnish. The quick-drytung oil woodwork varnish has the advantages that the drying speed is quick; the color of a dryer is light, and the drying property is strong; the surface of the varnish film after drying is flat, rich and smooth, the adhesion force is good, the hardness is high, and the luster is high; the impact-resistant and wiping-resistant properties are good; the prepared quick-dry tung oil woodwork varnishcan be used for coating furniture, floors and other woodworks.

Description

technical field [0001] The invention belongs to the technical field of wood coatings, and in particular relates to a preparation method of a quick-drying tung oil wood varnish. Background technique [0002] Tung oil is extracted from oil seeds by pressing or solvent. It is a natural triglyceride mixture. Its main component is triglyceride oleic acid. The structure is a pure natural renewable biomass material. Tung oil is a drying oil with the fastest drying speed among natural oils. When exposed to the air, it can dry quickly to form a translucent film. The resulting paint film is hard and dense, with good gloss, strong adhesion, acid and alkali resistance, so Before the 1980s, tung oil occupied the main position in the application of the paint industry, and it was a widely used, environmentally friendly and renewable paint resource. However, the slow drying speed of tung oil, the poor performance of the paint film after drying, and the poor decorative effect are the main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D191/00C09D125/06C09D7/20
CPCC08L2205/03C09D7/20C09D191/005C08L25/06C08L83/12
Inventor 杨焰余云廖有为杨宁宁黄彬
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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